lisa_shell: fix reported URL
Created by: derkling
Jupyter notebook 4.3.1 introduces protection from cross-site request forgeries, requiring API requests to either:
- originate from pages served by this server (validated with XSRF cookie and toekn)
- authenticate with a token
This patch adds support to generate a random token and report it in the complete URL thus allowing the user to properly get the complete address where her server is running.
Signed-off-by: Patrick Bellasi patrick.bellasi@arm.com